[quote=Magic Magnum] That's a confirmed. Everything evolves and adapts, no reason a disease one day would not evolve to a point the vaccine fails to work.Hell that's basically what I said above in regards to flu shots. However just as the disease evolves/changes so will the vaccines, we'd simply have to come out with new vaccines to deal with the new evolved viruses. [/quote] I agree. Just knowing a disease will evolve doesn't mean we should stop trying. The concern that a vaccine will stop working in the future is in no way helped by ceasing the use of vaccines right here and now.